New ZED Mini revision creates warped image

the new batch of ZED Mini’s we ordered seem to be from a new revision. The lenses are different.

In the ZED Explorer it looks like this:

We found that these cameras create a strong fisheye-like warping in the resulting image. We use ZED SDK 3.8.2 with the Unity SDK (but a custom camera rig). ZED-Calibration did not work (we were not able to align the blue circle).

I am trying to figure out if the problem is in our camera rig or somewhere in the SDK. Does anybody have similar problems?
Is there a first party application which we can use for further testing?

Thank you!

Here is a photo from the new lenses